<?php

// Created by bouchon
// http://dev.maxg.info

// Need help ? http://forum.maxg.info

class zip
{
	var $datasec, $ctrl_dir = array();
	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
	var $old_offset = 0;
	var $dirs = Array('.');

	function get_List($zip_name)
	{
		$zip = @fopen($zip_name, 'rb');
		if (!$zip)
		{
			return 0;
		}
		$centd = $this->ReadCentralDir($zip,$zip_name);

		@rewind($zip);
		@fseek($zip, $centd['offset']);

		for ($i = 0; $i < $centd['entries']; $i++)
		{
			$header = $this->ReadCentralFileHeaders($zip);
			$header['index'] = $i;
			$info['filename'] = $header['filename'];
			$info['stored_filename'] = $header['stored_filename'];
			$info['size'] = $header['size'];
			$info['compressed_size'] = $header['compressed_size'];
			$info['crc'] = strtoupper(dechex( $header['crc'] ));
			$info['mtime'] = $header['mtime'];
			$info['comment'] = $header['comment'];
			$info['folder'] = ($header['external'] == 0x41FF0010 || $header['external'] == 16) ? 1 : 0;
			$info['index'] = $header['index'];
			$info['status'] = $header['status'];
			$ret[] = $info;
			unset($header);
		}
		return $ret;
	}

	function Add($files, $compact)
	{
		if (!is_array($files[0]))
		{
			$files = Array($files);
		}

		for ($i = 0; isset($files[$i]); $i++)
		{
			$fn = isset($files[$i]) ? $files[$i] : '';
			if(basename($fn[0]))
			$ret[basename($fn[0])] = $this->add_File($fn[1], $fn[0], $compact);
		}
		return $ret;
	}

	function get_file()
	{
		$data = implode('', $this -> datasec);
		$ctrldir = implode('', $this -> ctrl_dir);

		return $data . $ctrldir . $this -> eof_ctrl_dir .
				pack('v', sizeof($this -> ctrl_dir)).pack('v', sizeof($this -> ctrl_dir)).
				pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
	}

	function add_File($data, $name, $compact = 1)
	{
		$name = str_replace('\\', '/', $name);
		$dtime = dechex($this->DosTime());

		$hexdtime = '\x' . $dtime[6] . $dtime[7].'\x'.$dtime[4] . $dtime[5]
					. '\x' . $dtime[2] . $dtime[3].'\x'.$dtime[0].$dtime[1];
		eval('$hexdtime = "' . $hexdtime . '";');

		if ($compact)
		{
			$fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00" . $hexdtime;
		}
		else
		{
			$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00" . $hexdtime;
		}
		$unc_len = strlen($data); $crc = crc32($data);

		if ($compact)
		{
			$zdata = gzcompress($data);
			$c_len = strlen($zdata);
			$zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
		}
		else
		{
			$zdata = $data;
		}
		$c_len = strlen($zdata);
		$fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
		$fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata;

		$fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);

		$this -> datasec[] = $fr;
		$new_offset        = strlen(implode('', $this->datasec));
		if ($compact)
		{
			$cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
		}
		else
		{
			$cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
		}
		$cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
		$cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 );
		$cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 );
		$cdrec .= pack('V', $this -> old_offset );

		$this -> old_offset = $new_offset;
		$cdrec .= $name;
		$this -> ctrl_dir[] = $cdrec;
		return true;
	}

	function DosTime() {
		$timearray = getdate();
		if ($timearray['year'] < 1980)
		{
			$timearray['year'] = 1980;
			$timearray['mon'] = 1;
			$timearray['mday'] = 1;
			$timearray['hours'] = 0;
			$timearray['minutes'] = 0;
			$timearray['seconds'] = 0;
		}
		return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) |
				($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
	}

	function Extract($zn, $to, $index = Array(-1), $createpath = true)
	{
		if (!@is_dir($to))
		{
			bab_mkdir($to, $GLOBALS['babMkdirMode']);
		}
		$ok = 0;
		$zip = @fopen($zn,'rb');
		if (!$zip)
		{
			return -1;
		}
		$cdir = $this->ReadCentralDir($zip,$zn);
		$pos_entry = $cdir['offset'];

		if (!is_array($index))
		{
			$index = array($index);
		}
		for ($i = 0; isset($index[$i]); $i++)
		{
			if (intval($index[$i]) != $index[$i] || $index[$i] > $cdir['entries'])
			{
				return -1;
			}
		}

		for ($i=0; $i<$cdir['entries']; $i++)
		{
			@fseek($zip, $pos_entry);
			$header = $this->ReadCentralFileHeaders($zip);
			$header['index'] = $i; $pos_entry = ftell($zip);
			@rewind($zip); fseek($zip, $header['offset']);
			if (in_array('-1', $index) || in_array($i,$index))
			{
				$stat[$header['filename']] = $this->ExtractFile($header, $to, $zip,$createpath);
			}

		}
		fclose($zip);
		return $stat;
	}

	function ReadFileHeader($zip)
	{
		$binary_data = fread($zip, 30);
		$data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);

		$header['filename'] = fread($zip, $data['filename_len']);
		if ($data['extra_len'] != 0)
		{
			$header['extra'] = fread($zip, $data['extra_len']);
		}
		else
		{
			$header['extra'] = '';
		}

		$header['compression'] = $data['compression'];$header['size'] = $data['size'];
		$header['compressed_size'] = $data['compressed_size'];
		$header['crc'] = $data['crc']; $header['flag'] = $data['flag'];
		$header['mdate'] = $data['mdate'];$header['mtime'] = $data['mtime'];

		if ($header['mdate'] && $header['mtime'])
		{
			$hour = ($header['mtime'] & 0xF800) >> 11;
			$minute = ($header['mtime'] & 0x07E0) >> 5;
			$seconde = ($header['mtime'] & 0x001F) * 2;
			$year = (($header['mdate'] & 0xFE00) >> 9) + 1980;
			$month = ($header['mdate'] & 0x01E0) >> 5;
			$day=$header['mdate'] & 0x001F;
			$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
		}
		else
		{
			$header['mtime'] = time();
		}

		$header['stored_filename'] = $header['filename'];
		$header['status'] = 'ok';
		return $header;
	}

	function ReadCentralFileHeaders($zip)
	{
		$binary_data = fread($zip, 46);
		$header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);

		if ($header['filename_len'] != 0)
		{
			$header['filename'] = fread($zip,$header['filename_len']);
		}
		else
		{
			$header['filename'] = '';
		}

		if ($header['extra_len'] != 0)
		{
			$header['extra'] = fread($zip, $header['extra_len']);
		}
		else
		{
			$header['extra'] = '';
		}

		if ($header['comment_len'] != 0)
		{
			$header['comment'] = fread($zip, $header['comment_len']);
		}
		else
		{
			$header['comment'] = '';
		}

		if ($header['mdate'] && $header['mtime'])
		{
			$hour = ($header['mtime'] & 0xF800) >> 11;
			$minute = ($header['mtime'] & 0x07E0) >> 5;
			$seconde = ($header['mtime'] & 0x001F)*2;
			$year = (($header['mdate'] & 0xFE00) >> 9) + 1980;
			$month = ($header['mdate'] & 0x01E0) >> 5;
			$day = $header['mdate'] & 0x001F;
			$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
		}
		else
		{
			$header['mtime'] = time();
		}
		$header['stored_filename'] = $header['filename'];
		$header['status'] = 'ok';
		if (substr($header['filename'], -1) == '/')
		$header['external'] = 0x41FF0010;
		return $header;
	}

	function ReadCentralDir($zip, $zip_name)
	{
		$size = filesize($zip_name);
		if ($size < 277)
			$maximum_size = $size;
		else
			$maximum_size = 277;

		@fseek($zip, $size - $maximum_size);
		$pos = ftell($zip);
		$bytes = 0x00000000;

		while ($pos < $size)
		{
			$byte = @fread($zip, 1);
			$bytes = ($bytes << 8) | Ord($byte);
			if (($bytes & 0xFFFFFFFF) == 0x504b0506)
			{
				$pos++;
				break;
			}
			$pos++;
		}

		$data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',
		fread($zip, 18));

		if ($data['comment_size'] != 0)
		{
			$centd['comment'] = fread($zip, $data['comment_size']);
		}
		else
		{
			$centd['comment'] = ''; $centd['entries'] = $data['entries'];
		}
		$centd['disk_entries'] = $data['disk_entries'];
		$centd['offset'] = $data['offset'];$centd['disk_start'] = $data['disk_start'];
		$centd['size'] = $data['size'];  $centd['disk'] = $data['disk'];
		return $centd;
	}

	function ExtractFile($header, $to, $zip, $createpath = true)
	{
		$header = $this->readfileheader($zip);
		if (!$createpath)
		{
			$header['filename'] = basename ($header['filename']);
		}
		if (substr($to,-1) != '/')
		{
			$to .= '/';
		}
		if (substr($header['filename'],-1) == '/')
		{
			bab_mkdir($to.$header['filename']);
			return +2;
		}

		$pth = explode("/",dirname($header['filename']));
		for ($i = 0, $tmp = ''; isset($pth[$i]); $i++)
		{
			if (!$pth[$i])
			{
				continue;
			}
			if (!is_dir($to.$tmp.$pth[$i]))
			{
				bab_mkdir($to.$tmp.$pth[$i]);
			}
			$tmp .= $pth[$i].'/';
		}
		 
		if (!isset($header['external']) || (isset($header['external']) && !($header['external']==0x41FF0010)&&!($header['external']==16)))
		{
			 
			if ($header['compression'] == 0)
			{
				$fp = @fopen($to.$header['filename'], 'wb');
				if(!$fp) return(-1);
				$size = $header['compressed_size'];

				while ($size != 0)
				{
					$read_size = ($size < 2048 ? $size : 2048);
					$buffer = fread($zip, $read_size);
					$binary_data = pack('a'.$read_size, $buffer);
					@fwrite($fp, $binary_data, $read_size);
					$size -= $read_size;
				}
				fclose($fp);
				touch($to.$header['filename'], $header['mtime']);

			}
			else
			{
				 
				$fp = @fopen($to.$header['filename'].'.gz', 'wb');
				if (!$fp)
				{
					return(-1);
				}
				$binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),
				Chr(0x00), time(), Chr(0x00), Chr(3));

				fwrite($fp, $binary_data, 10);
				$size = $header['compressed_size'];

				while ($size != 0)
				{
					$read_size = ($size < 1024 ? $size : 1024);
					$buffer = fread($zip, $read_size);
					$binary_data = pack('a'.$read_size, $buffer);
					@fwrite($fp, $binary_data, $read_size);
					$size -= $read_size;
				}

				$binary_data = pack('VV', $header['crc'], $header['size']);
				fwrite($fp, $binary_data,8); fclose($fp);

				$gzp = @gzopen($to.$header['filename'].'.gz','rb');
				if(!$gzp){
					@gzclose($gzp); @unlink($to.$header['filename']);
					die("Archive is compressed whereas ZLIB is not enabled.");
				}
				$fp = @fopen($to.$header['filename'],'wb');
				if(!$fp) return(-1);
				$size = $header['size'];

				while ($size != 0)
				{
					$read_size = ($size < 2048 ? $size : 2048);
					$buffer = gzread($gzp, $read_size);
					$binary_data = pack('a'.$read_size, $buffer);
					@fwrite($fp, $binary_data, $read_size);
					$size -= $read_size;
				}
				fclose($fp); gzclose($gzp);

				touch($to.$header['filename'], $header['mtime']);
				@unlink($to.$header['filename'].'.gz');

			}
		}
		return true;
	}
}

?>